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The importance of the standard sample for accurate estimation of the concentration of net energy for lactation in feeds on the basis of gas produced during the incubation of samples with rumen liquor = Pomen standardnega vzorca za točno oceno vsebnosti neto energije za laktacijo v krmi na podlagi plina, ki se razvije med inkubacijo vzorcev z vampnim sokomŽnidaršič, Tomaž, zootehnika ; Verbič, Jože ; Babnik, Drago, 1958-Namen tega dela je bil preveriti, ali je uporaba standardnega vzorca pri izvajanju Hohenheimskega plinskega preizkusa sploh potrebna. V obdobju treh let smo inkubirali z vampnim sokom in vitro 24 ... serij vzorcev voluminozne krme. Poleg vzorcev krme smo v poskus vključili tudi vzorce sena, ki so nam ga poslali z univerze v Hohenheimu (HFT-99). Polovico serij smo inkubirali z vampnim sokom krav, polovico z vampnim sokom ovc. Merili smo količino plina, ki se razvije med 24 urno inkubacijo in jo primerjali z deklarirano vrednostjo vzorca HFT-99. Poleg HFT-99 smo v poskus vključili tudi 25 preizkusnih vzorcev krme z znanimi in vivo določenimi prebavljivostnimi koeficienti. Na podlagi tvorbe plina pri HFT-99 smo ugotovili, da vrsta živali (govedo ali ovce) ni vplivala na aktivnost vampnega soka (41,4 vs. 42,2 ml plina na 200 mg sušine, p>0,1). Tudi razlike med leti niso bile značilne (41,9, 41,2 in 42,3 ml plina na 200 mg sušine, p>0,1). Variabilnost med serijami je bila približno 10 %, od 38,9 do 43,7 ml plina na 200 mg sušine). Tvorba plina pri HFT-99 je bila v tem poskusu približno 6 % manjša od vrednosti, ki so jo dobili na Univerzi Hohenheim (41,8 vs. 44,43 ml na 200 mg sušine). To nakazuje, da obstajajo sistematična odstopanja med laboratoriji. V primeru petindvajsetih preizkusnih vzorcev je korekcija na podlagi standardnega vzorca zmanjšala povprečno razliko in vitro ocenjenih vsebnosti neto energije za laktacijo (NEL) od in vivo določenih vrednosti. Sklepamo, da je glede na variabilnost med serijami in glede na sistematične razlike v aktivnosti vampnega soka med laboratorijema, uporaba standardnega vzorca pri izvajanju Hohenheimskega plinskega preizkusa nujna.Source: Journal of Central European Agriculture [Elektronski vir] : JCEA. - ISSN 1332-9049 (Letn. 4, št. 2, 2003, str. [77]-86)Type of material - e-articlePublish date - 2003Language - slovenianCOBISS.SI-ID - 1528936
Author
Žnidaršič, Tomaž, zootehnika |
Verbič, Jože |
Babnik, Drago, 1958-
Topics
prehrana živali |
voluminozna krma |
vampni sok |
prežvekovalci |
standardni vzorci |
neto energija |
laktacija
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source: Journal of Central European Agriculture [Elektronski vir] : JCEA. - ISSN 1332-9049 (Letn. 4, št. 2, 2003, str. [77]-86)
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Žnidaršič, Tomaž, zootehnika | 22606 |
Verbič, Jože | 10035 |
Babnik, Drago, 1958- | 05658 |
Source: Personal bibliographies
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